Invalid backend model specified: aw_giftcard2/product_attribute_backend_templates

#0 /home/qursch/public_html/app/code/core/Mage/Eav/Model/Entity/Attribute/Abstract.php(363): Mage::exception('Mage_Eav', 'Invalid backend...')
#1 /home/qursch/public_html/app/code/core/Mage/Eav/Model/Entity/Abstract.php(640): Mage_Eav_Model_Entity_Attribute_Abstract->getBackend()
#2 /home/qursch/public_html/app/code/core/Mage/Eav/Model/Entity/Abstract.php(1624): Mage_Eav_Model_Entity_Abstract->walkAttributes('backend/afterLo...', Array)
#3 /home/qursch/public_html/app/code/core/Mage/Eav/Model/Entity/Abstract.php(964): Mage_Eav_Model_Entity_Abstract->_afterLoad(Object(Mage_Catalog_Model_Product))
#4 /home/qursch/public_html/app/code/core/Mage/Catalog/Model/Resource/Abstract.php(698): Mage_Eav_Model_Entity_Abstract->load(Object(Mage_Catalog_Model_Product), '6730', NULL)
#5 /home/qursch/public_html/app/code/core/Mage/Core/Model/Abstract.php(225): Mage_Catalog_Model_Resource_Abstract->load(Object(Mage_Catalog_Model_Product), '6730', NULL)
#6 /home/qursch/public_html/app/code/local/Ecommage/Rewritevendor/Controller/Router/Vendor.php(172): Mage_Core_Model_Abstract->load('6730')
#7 /home/qursch/public_html/app/code/core/Mage/Core/Controller/Varien/Front.php(172): Ecommage_Rewritevendor_Controller_Router_Vendor->match(Object(Mage_Core_Controller_Request_Http))
#8 /home/qursch/public_html/app/code/core/Mage/Core/Model/App.php(354): Mage_Core_Controller_Varien_Front->dispatch()
#9 /home/qursch/public_html/app/Mage.php(683): Mage_Core_Model_App->run(Array)
#10 /home/qursch/public_html/index.php(88): Mage::run('', 'store')
#11 {main}